simple accessor to get meta data passed into models

[jacobbullock]

Fixes issue #155 by adding the meta data for a model accessible without any requirement of adding that meta data to the datastore.

[coveralls]

Coverage increased (+0.02%) to 90.465% when pulling 84c95291b4b374f99d9b5e6d49a0c4fd358c150c on jacobbullock:model-meta into a6507f9e96de35d43de4a143739628ecc147937f on ghidoz:master.

[bekopharm]

I'd like to add a second thumbs up but since this is not possible I just add this lame comment :)

[jacobbullock]

@safo6m do i need to write tests for this?

[MarkCorneth]

What is still blocking this feature from getting into master?

[safo6m]

@jacobbullock can you please resolve the conflicts?

[jacobbullock]

@safo6m Sorry,been distracted with other things. i'll get to it this weekend.

[lukasalphta]

@jacobbullock Hi! Any chance that this is going to be merged?

[tegola]

I second the request to get this merged.

[GertjanJ]

I'd also like this merged :)